Question

What is the Big Bang Theory? What did it lead to and how?

Answer 1

Big Bang Theory is the known and highly supported cosmological model that is found to be a valid explanation for the origin of the universe and its earlier know time. Big Bang theory states that the universe exploded from the point of infinite density and very high temperature and lead to the subsequent formation of subatomic particles, then atoms, then first elements of hydrogen and helium and traces of lithium. The event is said to have occurred 13.799 +/- 0.0271 billion years ago. The pieces of evidence of such an explosion are obtained from the light elements, cosmic microwave background, large scale structure, and Hubble's Law. Now the origins of this theory lie in the fact that our universe is expanding. Hence, it means that it would have been a point in the start at some time in the past. By extrapolating the universe back in time, it leads to starting point or the physical existence of the singularity. Though currently the theory isn't completely extrapolated as there are certain inconsistencies such as the infinite density at the point, the theory owns much wider acclaim from the fact that universe is expanding and hence it definitely has a starting point.